Laserfiche WebLink
�J <br />The proposed sampling and testing procedure include collecting approximately <br />30 -50 samples from the active West Pit. These samples will then be split into <br />three equal samples, by the Colowyo lab. The three samples will then be <br />analyzed by two outside labs (SGS and Wyoming Analytical) and the Colowyo <br />on -site lab. It is proposed that each sample have a short proximate analysis, <br />ASG, and Relative Density per Australian Standard AS1038.21 performed. <br />The results will then be reviewed to determine the following: <br />• Repeatability between laboratories and test methods <br />• Determination of best coal density estimator between ASG, ASTM density <br />and Australian Relative Density tests. <br />This program will not commence until Mr. Mike Whateley has reviewed these <br />results, provided comments, and recommends moving ahead with these tests. <br />ASG in the Colowyo Database <br />While reviewing the Colowyo ASG data in detail, two distinct sets of ASG trends <br />were observed on ASG vs AR Ash scatter - graphs, see Figure 2. Upon, further <br />review of the spreadsheets which previously stored the Colowyo coal quality <br />data, it was found that many of the ASG values in the database had been <br />calculated values. The basis of the calculated values appears to follow SGS <br />estimations of ASG. However, the factors in the equation do not match SGS <br />values and their origin is currently unknown. <br />The ASG values in the database of the Utah International Data and much of the <br />KEC data were found to have calculated ASG values in the database. These data <br />account for the two sets of ASG trends observed on the ASG vs AR Ash scatter - <br />graphs, see Figure 2. <br />The actual ASG values compared well with the ASG values of the 2004 drilling <br />data. The actual ASG values still contain the same type of stratification on ASG <br />